From: Jouni Malinen <jouni@codeaurora.org>
Date: Wed, 24 Jul 2019 16:35:14 +0000 (+0300)
Subject: EAP-SIM server: Avoid void pointer arithmetic
X-Git-Tag: hostap_2_9~57
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fe2e1edf431dddd299a87d74d65de12f20a25bf7;p=thirdparty%2Fhostap.git

EAP-SIM server: Avoid void pointer arithmetic

This is a compiler specific extension and not compliant with the C
standard.

Fixes: 1c16b257a081 ("EAP-SIM: Add Session-Id derivation during fast-reauth")
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---

diff --git a/src/eap_server/eap_server_sim.c b/src/eap_server/eap_server_sim.c
index 66a087212..f8aa508ec 100644
--- a/src/eap_server/eap_server_sim.c
+++ b/src/eap_server/eap_server_sim.c
@@ -286,7 +286,7 @@ static struct wpabuf * eap_sim_build_reauth(struct eap_sm *sm,
 	 * Session-Id calculation after receiving response from the peer and
 	 * after all other checks pass. */
 	os_memcpy(data->reauth_mac,
-		  wpabuf_head(buf) + wpabuf_len(buf) - EAP_SIM_MAC_LEN,
+		  wpabuf_head_u8(buf) + wpabuf_len(buf) - EAP_SIM_MAC_LEN,
 		  EAP_SIM_MAC_LEN);
 
 	return buf;